Tennessee is about 27 times bigger than South Georgia and South Sandwich Islands.

South Georgia and South Sandwich Islands is approximately 3,903 sq km, while Tennessee is approximately 106,752 sq km, making Tennessee 2,635% larger than South Georgia and South Sandwich Islands.
Tip: This to-scale comparison of South Georgia and South Sandwich Islands vs. Tennessee uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: Tennessee vs. South Georgia and South Sandwich Islands